Do you feel that any of the FF games really failed to live up to their potential? Like they could have been so much better, but just fizzled out for you?

Which game(s) do you feel fall under that category? What could they have done differently?

(SPOILER)You all know my answer already (SPOILER)It's FFXII if you didn't, could have been sooo much better IMO, I probably would've loved it with stronger characters and a different battle system